chadwick and c



L. s. CHADWICK AND 0. c. REHMER. FASTENING MEANS FOR OVEN DOORS AND THE LIKE.

. APPLICATION FILED NOV. I. I915- I 1,810,823,, Patented July 22, 1919.

2 SHEETS-SHEET l- Lgs. CHADWICK AND a. c.- REHMERI FASTENING MEANS FOR OVEN DOORS AND THE LIKE. APPLICATION FILED NOV- I, I9I5 1,3 1 0,823 Patentd July 22, 1919.

j j 2 SHEETS-SHEET 2- LEE S. GHADWICK, OF EAST CLEVELAND, AND CARL C. REHMER, OFLLEVELAND, OHIO, ASSIGN'ORS TO THE CLEVELAND METAL PRODUCTS COMPANY, OF CLEVELAND, OHIO,

A CORPORATION OF OHIO.

FASTENING MEANS FOR- OVEN-DOORS AND LIKE.

Specification of Letters Patent.

I Patented July 22, 1919.

Application filed November ifl9l5. Serial No. 58,951.

To all whom it may concern:

Be it known that we, (1) LEE S. CHAD- wroK, (2) CARL G. REHMER, residing at East Cleveland, (1) Cleveland (2), in the j county of Cuyahoga and State of Ohio, have invented a certain new and useful 'Improve- .ment in Fastening Means for Oven-Doors with the frame or jam'b wherewith it cooperates.

A further object is to provide a fastening means for two elements, one of'which may I constitute a frame or jamb, and the other a closure for cooperation with the frame orjamb, and by either one of which the fastening means may be carried or supported, and which will, in its operation, reach out and engage the other element and draw the two firmly together, even though there be an appreciable gap between the elements at the time the operation of the fastening means is initiated.

In more limited language, the invention has as its object the provision of a fastening means for the purpose aforesaid which comprises a rock shaft that may be carried by one of the elements and Whereon there is fixed one or more fingers for cooperation with the other element, the rock shaft having an offset with which a member having an established course of movement with re-- spect to the element that carries or supports the shaft, may cooperate to rock the shaft and move the aforesaid fingers into position to engage the other element, the member bein arranged to override the offset and retain it against reverse movement when the aforesaid fingers are in effective position. Also the rock shaft may be provided with a cam portion'beyond the offset and wherewith the aforesaid member may cooperate after it has overridden the offset and extreme limit of its movement, thereby to hold more firmly the fingers against the opposed element. It is a further object to utilize the aforesaid member whereby the shaft is rocked, as a keeper for the closure, the same having a portion for cooperation with the other element than the one whereby it is carried.

In its preferred embodiment the invention may be said to consist of a rock shaft that is supported by one element and has one or more fingers for cooperation with the other, thereby to hold the elements firmly together and against separation; and a keeper which is movably carried by the same element as supports the rock shaft, and which, in its act to further oscillate therock shaft to the movement into cooperation with the other element, will oscillate'the shaft to swing the aforesaid finger or; fingers to effective 1 position, the keeper serving, thereafter, to

lock the rock shaft against return movement. A further object of the invention isgthe provision of fastening means of the above is highly efiicient, and which is very positive and convenient of operation.

In the accompanying drawing we have shown an embodiment of ourinvention, and while we will proceed 'to describe the same in detail we wish to be understood as not limiting ourselves to the structural details thereof further than' i-iis required by the terms of the annexed claims and is rendered necessary by the prior state of the art.

In the drawings, Figure 1 represents a vertical transverse section through an oven, the view being taken as looking toward the door which is equipped with the fastening means of our invention; Fig. 2 is a frag ment of Fig. l, and shows the fastening means in ineffective position; Figs. 3, 4 and 5 are sectional details on the respective lines 33, 44 and 5-5 of Fig. 1; Fig. 6 shows, in perspective, the various elements of the fastening means in separated condition and includes a fragment of the door liner.

To illustrate a practical application of our invention, we have elected to show it associated with an oven f the sheet metal variety, the same comprising a top 1,'bottom 2, side walls 3, and a frontwall 4, the

latter having an openin 5, the top, bottom from the opening in a plane substantially. parallel to the surface of the wall. Hinged to the front wall 45 in the usual manner and at one side of the opening 5 (the bottom side in the present instance), is a door 10, the

front. Wall being reinforced by an inwardly openin channel 11, the hinge members 12 being s own as extending through the web of the channel member and separated, in accordance with the usual practice. The door 10 may be provided with glass panels 13. The foregoing features constitute no part of our present invention and further detailed illustration or description of them is deemed unnecessary.

The door 10 is constructed of a front plate 15 and a liner 16, the latter being s aced from the former by having portions 1 adjacent its edges, turned at an angle to its body portion toward the front plate and then outward in a plane substantially parallel to its body portion, as shown at 19, the edges of the front plate 15 being bent inward and about the portions 19 to hold the frontplate and liner securely together. At about the center of the free edge of the door, the liner is pressed into contact withthe front plate for some distance back from the edge, to form a cavity 20 that is occupied by certain parts of our locking. means presently to be described. Journaled within the angle between the body portion 16 of the liner, and the inclined portion thereof adjacent the free edge of the door, which portion has been generally referred to as 17, but this particular part of which will hereinafter be denominated portion 17, is a'rock shaft 25, that is preferably formed of a rod or wire, bent into a shape to provide fingers 26, a central cam portion 27, and a substantially radial portion 28. As will be clearly seen from Fig. 6, the fingers 26 are formed by loops that are produced by buckling the wire adjacent its ends, and the radial portion 28 is formed by turning a part of the wire at substantially right angles to the body portions to which the numeral 25 is applied,

thereby constituting, of the portion 28, a

rocker arm for the shaft. The remainder of the wire between the adjacent ends of the portions 25 constitutes what we have termed the cam portion 27. The edge of the liner is notched at 30 for the accommodation of the side portions of the fingers 26; and at its center, the same edge of the liner is slotted at 31 for the reception of one side of the cam portion 27, and the rad al portion 28 Of the rock'shaft. 'Beyond the notches 30 toward each end of the door,- the angle between the portion 17 and the body portion of the liner is punched inward to form ockets 32-, there being openings left on each side of the strip or tongue of material which forms the bottom of the pocket, as clearly shown in the drawings.

The mannerof assembling the parts will be clearly understood from an inspection of Figs. 6 and 7. Bearing plates 33 are dropped into the pockets 32 of the liner. These bearing plates are used to reinforce the material of the liner and thereby produce substantial bearings for the shaft. Thereafter, one end of the shaft 25 may be inserted from the under side of the portion 17 transversely V through the pocket and into the bearing ortion 34 of the bearing plate 33. The sh is pushed through the first pocket 32 until its opposite end may be inserted, in like manner, through the pocket at the opposite end of the door. The shaft is then centralized within the liner, when it may be readily swung upward so that the fingers 26 will enter the notches 30, and the radial ortion 28, and one side of the cam portion 2 will pass into the notches 31. The front plate 15 may then be applied to the liner and its edges crimpedabout the edge portions 19 thereof. Attention is called to the fact that in the mounting of the shaft no' mechanical operations are required, such as. riveting, etc., because the ends of the shaft hold the bearing plates 33 securely in place against any possible chance of their being dislocated, and the portions of the liner adjacent the fingers 26 and central portion of the rock shaft will "bearing portion 36 of the handle therein, a

spacer 39 is applied to the shank of the handle. This spacer consists of a dished washer, and, when in place, its open side is adjacent the end of the shank for the reception of the depressed central portion of a keeper 40. The depressed portion of the keeper is provided with a central aperture 41 of substantially the same shape and size as the cross sectional area of the shank 38,

and is adapted to be applied to said shank after which the shank is riveted over to retainthe parts securely against separation. It will be understood that the keeper may be rotated by the ha dl 7 because .Of the fact that they are locked together by reason of the corresponding shapes of the aperture 41 and shank 38.

The keeper 40 is provided* with a latch arm 42 and an actuating arm '43, and when the-parts are assembled and in effective position, the former arm reposes upon one side of the cam portion 27, while the actuatingarm 43 reposes on the opposite side thereof. On its side remote from the arm 42, the keeper is provided with what we have termed a bearing shoe 45 which is adapted to bear against and traverse the bottom of the cavity 20, when the keeper is turned.

With the foregoing construction inmind,

the operation of the fastening means will be readily understood. With the parts in the condition shown in Fig. 2, the door may be closed. By means of the handle 37, the keeper may be turned in the direction indicated by the arrow in Fig. 2, to the position shown in Fig. 1. Such an operation swings the latch arm 42 up over the flange 6 of the front wall 4, the latch arm being of such shape as to exert a camming action against the flange and draw the edge of the door snugly into contact with the adjacent portion of the wall. At the same time, the actuating arm 43 of the keeper engages. the radial portion 28 of the shaft 25 and oscillates the shaft to swing the fingers 26 into engagement with the flange 6, the fingers being so shaped and proportioned that they will.

grasp the flange and effectually draw the door inward, eventhough there be an appreciable space ong'ap between the door and oven wall at the initial engagement of the fingers with the flange. It requires only a part of the movement of the actuating arm 43 to swing the fingers 26 to effective posi- 7 tion. Further movement of the actuating arm causes it to override the end of the radial portion 28 and coiiperate with the cam portion 27 Any extended movement after the actuating arm reaches the cam portion Willresult in a tightening up of the fingers 26 and a more thorough clamping of the door against the oven wall. Furthermore, with the actuating arm in this position, the shaft is effectually locked against return movement. When it is desired to unlock the door, the handle 37 is rotated in the reverse direction tothat just described, when the actuating arm 43will be removed from the cam portion of the shaft and entirely out of reach of the radial portion 28, to allow said radial portion to be engaged on its opposite side by the latch arm 42 and swing it to its original position, shown in Fig. 2, thereby to oscillate the shaft 25in a direction to move the fingers 26 to ineffectlve position.

It will be seen from the foregoing, that the keeper, besides acting as one of the se curing means for the door, operates to swing the rock shaft in both directions, and to securely hold the rock shaft against movement to inefiective position, when its actuating arm is in cooperation with the cam porverage thus created, to the point of contact of the shoe 4.5 with thebottom wall of the cavity, and reduces the strain upon the shank 38 to a substantially straight longitudinal pull.

Having thus described our invention,what we claim is 1. The combination with a pair of elements, one constituting a frame and the other a closure, of fastening means for the closure, said fastening means comprising a rock shaft supported by one element, said shaft having an offset portion and a cam portion at the outer end of the offset portion, a membercarried by and movable with re spect to said element for cooperation with the offset portion of the shaft, thereby to os- Y cillate the shaft when the member is moved,

so as to rock the shaftv to the extreme limit of its movement-and retain it in such posi tion, and a finger fixed to the shaft for engagement with-theother element.

2. The combination of a frame and closure, the closure comprising a front plate and liner, the liner being spaced from the front plate by having an inclined portion adjacent its edge bent at anangle toward the front plate and then outward in a plane substantially parallel to its body portion, the

edges of the liner and front plate being secured together, a rock shaft reposing within the angle between the body, portion and the aforesaid inclined portion of the liner, the shaft being buckled adjacent both ends to produce U-shaped fingers which radiate at substantially the same angle from'the shaft, the central portion of the shaft being bent to form a radial portion, the liner being notched inward fromits adjacent edge for the passage of the aforesaid fingers and the central portion of the shaft, an operating handle located on the outer side of the 010- sure and having a shank which projects therethrough and is rotatable on an axis substantially at right angles to and adjacent the plane of the rotating axis of the shaft, and a keeper secured to the inner end of the shank and having a latch arm thatis located on one i e 9 the rad al portion of the shaft, and having also an actuating arm located on the opposite side of said radial portion.

3. The combination of a frame and closure, the closure comprising a front plate and liner, the liner being spaced from the front plate by having an inclined portion adjacent its edge bent at an angle toward the front plate and then outward in a plane substantially parallel to its body portion, the edges of the liner and front plate being secured together, a rock shaft reposing within the angle between the body portion and the aforesaid inclined portion of the liner, the shaft being buckled adjacent both ends to produce U-shaped fingers which radiate at substantially the same angle from the shaft, the central portion of the shaft being bent to form' a radial portion that. is connected by a cam portion to the oppo'sedbody portion of the shaft, the liner being notched inwardly from its adjacent edge for the pas sage of the aforesaid fingers and the central portion of the shaft, an operating handle 10- catedon the outer side of the closure and having a shank which projects therethrough and is rotatable on an axis substantiall at right angles to and adjacent the lane 0 the rotating axis of the shaft, and a keeper secured to the inner end of the shank and having a latch arm that is located on one side of the central portion of the shaft and arranged for engagement'with-the frame, the keeper having also an actuating arm located on the opposite sideof the central portion of the shaft, the actuating arm and the latch arm being arranged to cooperate with o posite sides of the radial portion of the sha t when the aforesaid shank is rotated, thereby to oscillate the shaft, the actuating arm of the keeper being adapted tooverride the cam portion of the shaft when the latch arm of the keeper engages the frame, as and for the purpose specified.

4. The combination of a frame and closure, the closure comprising a front plate and liner, the liner being 'spaced from the front plate by having an inclined portion adjacent its edge bent at an angle toward the front plate and then outward in a plane substantially parallel to its body portion, the edges of the liner and front plate being secured together, a rock shaft reposing within the angle between the body portion and the aforesaid inclined portion of the liner,

- the shaft having radiating fingers adjacent its ends, the liner being notched inward from 1ts adjacent edge for the passage of the aforesaid fingers, the material of the liner being slit along parallel lines within the angle between itsbody ortion and the aforesaid inclined portion t ereby to form bearing pockets for the shaft.

5. The combination of a frame and 010- sure, the closure comprising a front plate and liner, the linerbeing spaced from the front plate by having an inclined portion adjacent its edge bent at an angle toward th front plate and then outward in a plane substantially parallel to its body portion, the edges of the liner and front plate being s'ecured together, a rock shaft reposing wlthin the angle between the body portion and the aforesaid inclined portion of the liner, the

shaft being buckled adjacent both ends to produce U-shaped fingers which radiate at substantially the same angle from the shaft, the liner bein notched inward from its adjacent edge for the passage of the aforesaid fingers, the material of the liner being slit along parallel lines adjacent each end of the shaftand within the angle between its body portion and the aforesaid inclined portion thereby to form pockets, bearing plates reposing within said pockets for the reception of the ends of the aforesaid shaft, said bearing plates having protruding ends which engage the adjacent portions of the liner to hold'the plates against undue movement, and mechanism for oscillating said shaft.

6. The combination with a pair of elements, one constituting a frame and'the other a closure, of fastening means for the closure comprising a rock shaft which consists of a rod having an offset portion, said shaft being supported by one element and having a finger for engagement with the other, and a keeper pivotally supported by the closure and having a latch arm that is adapted to engage the frame and an actuat- LEE S. CHADWICK. CARL C. REHMER.

Witnesses:

BRENNAN B. Wns'r, W. E. SHEPPARD. 

